There has been a great impact on the Major Leagues before African Americans players. African American players have added speed, athleticism, and style to the game of baseball. Ever since Jackie Robinson broke the color barrier on Aril 15, 1947 the game has never been the same.
Since the early days of the Negro Leagues, Blacks and baseball have enjoyed a special and unique romance a romance that burst into full bloom when Robinson signed with Brooklyn Dodgers. (ebony). The Cleveland Indians followed the Dodgers and signed first baseman/ outfielder Larry Doby on July 6, 1947, making him the first Black player in the American League. But even though there was an abundance of topnotch players who could have been signed, the infusion of Black players didn't proceed as quickly as many had hoped. In fact, it took 12 years for the Major Leagues to fully integrate, and it wasn't until the Boston Red Sox signed Elijah (Pumpise) Green in July 1959 that each major league team had at least one black. (ebony).
By the time the 50's rolled around the Negro League had started to suffer financial problems and the fans who had been supportive of the blacks in the Negro leagues could just as simply go watch the African Americans play in the Majors now. The Major Leagues was thriving like never before and from there on it was official baseball had a new look and blacks had redefined the limits of what could be accomplished in the sport. Blacks brought a whole new approach to the game because of there speed. (Ebony)
"What Black players did was take Black baseball [Negro League Baseball] to the majors. Before Blacks players arrived, major league baseball was base to base; you got on first base and waited for someone to hit the ball again, In Black baseball, when you got on base, you tried to steal second; they would bunt you over to third and you were in position to score runs without a hit." (Ebony)